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12v conversion for 9N

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Paul Biederman

04-25-2001 21:47:00




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I converted my 9N to 12v 3 months ago. I was tired of slow start and lots of dead batterys. I
purchased an SI10 alternator from a local auto store, made 2 simple brackets,used the existing wires, traded the pulley from the 6v gen. to the 12v alt. by enlarging the hole. to excite the alternator, I used a 12v turn signal flasher in series with the key. Grand total without the battery is a wopping $33.00 for the conversion.
If interested in getting help just e-mail Paul

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Brads 8N

04-26-2001 09:58:44




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 Re: 12v conversion for 9N in reply to Paul Biederman, 04-25-2001 21:47:00  
I put a 12 Volt Kit on my tractor that came with a wiring harness. My question is that I didn't wire any resistor or anything in line with the switch and it shuts off every time. It is charging great. Now if I could only figure out how the top of the alt. attaches to the tractor. I have it attached at the bottom now.



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Paul Biederman

04-26-2001 11:07:44




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 Re: Re: 12v conversion for 9N in reply to Brads 8N, 04-26-2001 09:58:44  
Brad, The dropping resistor is for the ignition coil. The 9N front mount coil is 6 volt. It will
burn up in a very short time with 12 volts applied without a resistor in series. Paul Biederman - bdlabs@jps.net - (209)533-8652 Call if you need help.



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Bill Ostrom

04-26-2001 09:49:41




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 Re: 12v conversion for 9N in reply to Paul Biederman, 04-25-2001 21:47:00  
I have seen this conversion. I assure you that it works just fine. Bill

By the way this is the same guy that solved my no oil pressure problem after re-build. He pumped the grease into the block and got me up and running.



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Bill Ostrom

04-26-2001 09:47:39




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 Re: 12v conversion for 9N in reply to Paul Biederman, 04-25-2001 21:47:00  
I have seen this conversion. I assure you that it works just fine. Bill



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Neal(IN)

04-26-2001 05:46:23




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 Re: 12v conversion for 9N in reply to Paul Biederman, 04-25-2001 21:47:00  
Paul
I have to ask about the flasher and why you don't get intermittent excite to the alternator. I'm guessing it is because you don't draw enough current to cause the flasher to flash. Am I close?

Neal



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Claus

04-26-2001 07:36:59




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 Re: Re: 12v conversion for 9N in reply to Neal(IN), 04-26-2001 05:46:23  
The way a flasher works is that the current going through the flasher heats a element. The element when heated will bend and open the circuit causing it to cool then bend back and close the circuit ad nauseum. When you turn the ignition key off the alternator is still turning and producing current from the diode trio which feeds the excite circuit that is accessible at pin 2 at the alternator. This current since it is electrically connected to the coil primary, will keep the igniton going and the tractor will not stop. Resistors, diodes, lamps and anything else that will interrupt the current to the ignition system will stop the tractor from running when the key is off.
Happy Motoring
Claus

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save the unwary--bj/8N/mt

04-26-2001 04:45:03




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 Re: 12v conversion for 9N in reply to Paul Biederman, 04-25-2001 21:47:00  
Lest some body find this post; follow it to the letter; and consider the job done why not post how you reduced the coil voltage so it is a complete set of instructions. Start over so with the same title so it comes up easier in the archives.

Your mileage may vary



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clever . . . Dell (WA)

04-25-2001 22:14:40




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 Re: 12v conversion for 9N in reply to Paul Biederman, 04-25-2001 21:47:00  
Paul..... .very clever, using a flasher as an "automatic isolation" device in the excite line from the ignition key instead of using a "idiot light" scheme, or a "blocking diode" scheme, or a "resistor" scheme.

I like it, thanks for sharing..... ..Dell



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